Bicycle frame



FIG. 1 is a bottom view of a bicycle frame;

FIG. 2 is a top view of a bicycle frame;

FIG. 3 is a left side view of a bicycle frame;

FIG. 4 is a right side view of a bicycle frame; and,

FIG. 5 is a top, right side perspective view of a bicycle frame. 

CLAIM The ornamental design for a bicycle frame, as shown and described. 